Fatal error: Uncaught Error: Class 'GuzzleHttp\Promise\RejectionException' not found in /home/legarden/www/app/plugins/custom-facebook-feed/vendor/guzzlehttp/promises/src/CancellationException.php:8 Stack trace: #0 {main} thrown in /home/legarden/www/app/plugins/custom-facebook-feed/vendor/guzzlehttp/promises/src/CancellationException.php on line 8